The ZGXM-1B-5 is used to protect signal systems such as cameras, monitors, and mobile communications, and to suppress inductive lightning and other shock waves from the signal line to protect the device from damage.

The ZGXM-MZ2J-5 Signal SPD can be used in the protection of the industrial control network, RS422 485 interface, automatic control and instrumentation lines, data lines, telephones, facsimile apparatus, and other equipment.